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Pd-m403 cd player skips thru all six cds (they are oriented correctly) without playing any selection, then get a message "no disc"

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  • Graeme Ross
    Graeme Ross May 11, 2010

    Hi



    Do you hear any noises from the player when it is trying to read. like high pitched squealing sounds, or a scratchy sound with a clunk?



    regards

    robotek

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2 Answers

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Hi there

Sure you can.for 12 years I was a prefferred service agent for Pioneer. I have repaired dozens of these units with this problem. It has been happening since they came up with the six disc changer mech. The Pioneer preferred way is to replace the optic, set the diffraction grating(not an easy task without the right gear) and mechanical alignment of the new optics. DO NOT USE CYNOACRYLATE BASED GLUES This is super glue. the fumes will cloud the lens and render it useless, I use Tarzan's Grip, a clear general purpose repair glue,used for say china,metal plastic etc.

  • I always make sure that the lens in orientated the same way as it came out. You can usually tell by the glue marks on the sides of the lens and the holder it seats into.
  • Refit the lens, then dab the sides of it and the holder, don't get too carried away.
  • I use at least 3-4 dabs about the sides of the lens, but don't put it under the lens before you seat it .
  • I then put something on top of it for at least 12 hours till the glue sets. then hopefully if all went as planned, it should again work.
I used to always check focal offset and tracking offsets, and tweak also the RF pattern to refocus the repaired assembly. You do need test gear to do that, but generally, the player will work if the lens is seated correctly and secured properly. Happy to talk to you more about my experience doing this job,or answer any questions about it.

regards
robotek

Posted on Nov 15, 2008

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I found that the lens had come loose and fallen off the optical reader. As you probably know, the laser reader on this Pioneer unit points down, making it easy for the lens to fall down. At present, it is not clear whether the lens can be put back on reliably/accurately enough. One repair shop here says he has never been able to successfully reattach a lens. Others have never run into this problem, so they can't guarantee they can successfully reinstall the lens. Have you folks run into this situation before and, if so, could the lens be reattached succesfully so the cd player will work ok again? Thanks.

Posted on Nov 15, 2008

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